+ Good volume and natural sound
+ Strap
+ Shock-resistant & non-slip Gummiummantellung
+ Fast installation with Blue tooth
+ Dust secure closure of ports
+ Solid workmanship
+ Suitable for outdoor use: power really good and audible music at the wheel (in wind and road noise)
+ Smart suction cup for fixing to smooth surfaces
- Might be a little easier
I had ordered me to it an X-Mi X Mini II Capsule Speaker. He was -with 2.7 watt clear volume down and the wheel barely perceptible. The well is intended only for buddies who want to interconnect their balls on the meadow. The rock armor with its 2 rubber tracks just fits better by my standards.
Addendum 03.03.2015:
The battery capacity has decreased significantly. The battery is not replaceable, unfortunately. The device ekes out its existence sometime only on cable. 2 points deduction for limited outdoor use.